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Page number:357 
Description type:Non-original description 
Description:Phellinus rimosus (Berk.) Pilat., Ann. Mycol. 38:80. 1940.
Polyporus rimosus Berk., London J. Bot. 4:54. 1845. Fomes rimosus (Berk.) Fr., Nov. Symb., p. 66. 1851.
Fom rimosus (Berk.) Cke., Grevillea 14:18. 1885 (nom. superf.).
Scindalma rimosus (Berk.) 0. Kuntze, Rev. Gen. Plant 3:519. 1898.
= Xanthochrous rimosus (Berk.) Pat., Essai Tag., p. 101. 1900.
Phellinus rimosus (Berk.) Bond. et Sing., Ann. Mycol. 39:56. 1941 (nom. superf.).
Lectotype--Mauritius, host, collector and date unknown (K). The specimen is represented by pieces c, f, g, and h (Fig. 1,2).
BASIDIOCARP: (Partly reassembled) ungulate, perennial, broadly attached to the substrate, hard and woody, 6 x 3.5 x 4.5 cm; UPPER SURFACE: Rimose, deeply fissured and cracked and separating into course thick scales that are arranged somewhat concentrically, becoming brownish black, forming a distinct black pellicle approximately 0.1 mm thick; margin narrow and abrupt; PORE SURFACE: Dark ferruginous brown to umber, plane to slightly convex, pores 4-6 per mm, round, mostly slightly dentate; TUBE LAYERS: Indistinctly stratified, individual layers 2-4 mm thick, pale ferruginous brown, these becoming stuffed with pale brown mycelia. PRIMARY CONTEXT: Somewhat zonate, pale ferruginous brown with some very faint pale colored streaks; SECONDARY CONTEXT: Not well developed, appearing concolorous.
PRIMARY CONTEXT HYPHAE of three kinds: Skeletal, 2.5-3 µm diam, arranged parallel, thick-walled, infrequently branched, some secondary septa present, dark brown, often with protuberances that resemble clamp connections; generative 2-2.5 (-3) µm diam, septate, branched, pale yellowish brown; binding 2-3 µm diam, aseptate, thick-walled, conspicuously and intricately branched, dark brown. SECONDARY CONTEXT HYPHAE: Poorly developed, skeletal 4.5-5.5 µm diam, arranged parallel, thick-walled, septa infrequent, dull brown; generative 2-2.5 µm diam, septate, thin-walled, pale tan. TRAMAL HYPHAE: Skeletal 4-5 µm diam, thick-walled, adventitious septa frequent, dark brown, arranged parallel; generative 2.5-3 µm diam, septate, pale tan, thin-walled. SETAE: Not seen. BASIDIA: Not seen. BASIDIOSPORES: 6-6.5 x 4.5-5.5 µm,
broadly ellipsoid to ovoid to subglobose, becoming thick-walled, dull brown in KOH, pale yellow brown in H20, darkening slightly in IKI.
Remarks-The revised concept of P. rimosus proposed here differs from that projected by Kotlaba and Pouzar (1978), Cunningham (1965), and other authors. The former concept of P. rimosus was predicated on a series of misidentifications. I examined numerous collections named
P. rimosus, which cannot presently be identified with any certainty with the Tasmanian or Mauritius lectotypes. Phellinus ba in sensu Gilbertson et al. (1976) and Gilbertson and Ryvarden (1987) do not fit this concept, an opinion that is contrary to that of Kotlaba and Pouzar (1978). Lowe (1957) and Cunningham (1965) indicate that the Mauritius specimen represents P. badius, but I disagree with this conclusion as does Ryvarden (1976).
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